Designed to be driven from a single ended triode output stage. Suitable for headphones with an impedance in the range 30 to 1000 ohms. High grade Grain Oriented Silicon Iron (M6) with air gap. This provides a high level capability and ultra low distortion, exceptional bandwidth and transient response which is maintained over the full dynamic range. Three separate secondary windings are provided which may be connected in series or parallel for 30 to 100, 100 to 250, 250 to 600 or more Ohms headphones. Package options. Shrouded or open frame with colour coded leads. Primary impedance 10K Ohms with tap at 5000 Ohms .